"Fetal tissue
No new fetal tissue is used to produce vaccines. Cell lines generated from a single fetal tissue source are sometimes used for some vaccines. Vaccine manufacturers obtain human cell lines from FDA-certified cell banks
Fetal Tissue and Vaccines.Some vaccines such as rubella and varicella are made from human cell-line cultures, and some of these cell lines originated from aborted fetal tissue, obtained from legal abortions in the 1960s.
No new fetal tissue is needed to produce cell lines to make these vaccines, now or in the future.
In 1964, there were an estimated 20,000 babies born with congenital rubella syndrome (CRS) in the United States. When women contract rubella disease during early pregnancy, this often causes miscarriage or neurological damage to the unborn child, resulting in the child suffering blindness, deafness and retardation. In 1993, the number of CRS cases was seven, reflecting a 99.9% reduction in this preventable disease since 1964.
In 1996, CDC, the American Academy of Pediatrics and the American Academy of Family Physicians jointly recommended routine use of varicella vaccine to protect children from chicken pox. In March 1995, this vaccine was licensed for use in the United States by the FDA and was shown to be safe and effective. Widespread use of varicella vaccine--which took more than 20 years for development, testing, and licensing--can help prevent thousands of children from being hospitalized each year because of complications from chicken pox. Complications of chickenpox include secondary infections such as group A streptococcal infections, which can lead to necrotizing fasciitis, multiple organ failure, shock, and death. In the United States each year, from 50 to 100 previously healthy children or adults die from complications associated with their chickenpox illness."
from: http://www.cdc.gov/nip/vacsafe/concerns/gen/contamination.htm